Photographic-printing apparatus.



l. K. KNAPP.

PHOTOGHAPHIG PRINTING APPARATUS.

APPLICATION man SEPT. la. Isls. Reuswzo Ara. I9. Isn.

1,231,173. PatentedJune 26,1917.

5mm/tay JnsaPH KKNAPP M m WV@ JOSEPH KARLV K NAPP, oF'NonTH PLATTE, NEBRASKA.

PHOTQGRAPHIC-PRDTTING APPARATUS. l

Specification of Letters Patent.

Patented June 26, 1917.

Application led September 13l 1S15,Serial No. 50,442. p Renewed April 19, 1917. Serial No. 163,313.

To all whom it may concern:

Be it known that I, .JOSEPH K. `KNAPP, a citizen ofthe United States, residing `at North Platte in the county of Lincoln and State of Nebraska, 4have invented certain new and useful Improvements in Photographic-Printing Apparatus; and I do declare the following to be 'a full, clear,andV ex-` act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in apparatus for printing photographs `from negatives and has for its object to providea device of this character which can also be used as a dark lantern.

A further object of my invention isf to provide a simply constructed combination dark lantern and photographic :printing frame which will be extremely eicient in operation y`et'which -can be very-inexpen sively manufactured. e

With the above and other objects in view my invention relates to'certain novel features of construction, combination and arrangement of parts which will be hereinafter more particularly described 4and claimed and as shown in the drawings wherein Figure 1 is a perspective view of my invention showing one side of the printing frame in open position;

Fig. 2 is a central vertical longitudinal section;

Fig. 3 is a transverse section on the line 3-3 of Fig. 2.

In the accompanying drawings wherein similar reference characters indicate corresponding parts throughout the several views, 1 denotes a casing which is substantially rectangular in formation and preferably constructed of metal, in one end of which is formed an electric lamp socket L, said end being bulged upwardly as shown at 2 to facilitate the attachment of the socket thereto. The opposite end of the casing 1 is open as shown at 3 and is adapted to receive an orange or red colored glass plate 4 through which the rays of light from the bulb 5 pass. This allows the casing to be used as a dark lantern in developing photographie plates or handling photographic material.

The top of the casing 1 is also open as shown at 6 and is adapted to receive a plain glass plate 7 therein when it is desired to print from film negatives, but when the negative is on a glass plate this plate 7 is removed and the glass negative substituted.

instead. The glass plate 7 is preferably held in position by the guides 8 which surround threesides of the opening 6, said guides being preferably formed by turning in the edges of the opening 6 and soldering upright flanges 9. to three of the sides of the casing, the fourth side being open for the insertion of the. glass plate 7 or the glass negative.

One of the flanges 9 is formed with a series of knuckles 10 adapted to co-act with similar knuckles 11 formed on the edges of a'pair of curved spring metal plates 12 and 13, a pintle being disposed through these knuckles 10 and. 11, thereby providing a hinged connection between the spring plates 12` and 13 and-the side of the casing l. The spring plates 12 and 13 are adapted to overlie therglass -plate'7 and to hold sensitized paper thereon so that the rays of light passing throu'h plate '7 will act on the sensitized rlIhe free ends of the spring plates 12 and 13 are provided with laterally eX- tending flanges l5 which project slightly above the flanges 9 of the guides and are adapted to co-act with a pair of spring catches 16.

These catches 16 may be of any preferred form but are here shown as constructed of strips of spring metal each having one end secured by soldering or other means to the side of the casing l, the free ends of said strips being bent laterally to provide hooks 17 which overlie the flanges on the spring plates. A finger piece 18 is preferably formed on' each of these hooks 17 to facilitate the movement of the catches. Each of the catches is surrounded by a housing 19 secured to the side of the casing 1 as best disclosed in Fig. 3.

In operation the glass negative is placed in the guides in the open side of the casing 1, the sensitized paper being placed on said plate and the spring metal plates 12 and 13 then clamped on said paper securely holding the same in contact with the glass negative. An electric current is then turned on to light the electric bulb and the rays of light act on the sensitized paper. One of the spring plates may be released at a time thus allowing the operator to examine. the print without causing it to shift to any extent on the negative.

As hereinbeforc stated, if film negatives are used in place of glass negatives, the films are placed on the. plate glass 7 and the sensitized paper thereon, the operation of printing being otherwise the same as when glass negatives are used.

From the foregoing description it is obvious that I have provided a very simple combination dark lantern and printing apparatus which Will effectively perform all of' the functions for which it is designed.

Having thus described my invention what I claim is:

l. In a device of the class described,y a substantially rectangular casing, one side thereof being open, guides formed around said open side, a glass plate disposed in said guides, a curved spring metal plate adapted to be positioned over said glass plate, a flange on one edge of said spring plate, a spring catch on said casing adapted to spring over said flange to hold said spring plate in operative position, and means for lighting the interior of said caslng.

2. A device of the class described com,- prisin a substantially rectangular casing, one sie thereof being open, guides formed around said open side, a glass platedisposed in said guides, a pair of curved spring metal plates hinged toone of the guides on one side of said opening, a laterally extending flange on the free end of each of said spring metal plates, a pair of spring catches disposed on the side of said casing for coae tion with said flanges, housings for said catches, and means for lighting the interior of said casing.

3. In a device of the class described cornprising a substantially rectangular metallic casing7 one side and one end thereof being open, a colored glass plate in said end opening, guides formed around said side opening, a. lass Plate disposed in said guides, a pair o curved spring-metal plates hinged to one of the guides enone side of said openv ing, a laterally extending flange on the free end of each of said spring plates, a pair of spring catches disposed on the side of said casin for co-action with said flanges, housings or said catches, and means for lighting the interior of said casin In testimony whereof have hereunto set my hand in presence of two subscribing witnesses.

JOSEPH KARL KNAPP.

Witnesses :v

J mms F. CROWLEY, HARRY WALTERS;

Gopies of this patent may be obtained. for five cents each. by addressing the Commissioner of Patents, Washington, D. C. 

